期刊
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
卷 2022, 期 10, 页码 -出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/ptep/ptac121
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资金
- JSPS KAKENHI [JP21K03547]
In this study, an interior solution of a physically symmetric vierbein with two unknown functions in conformal teleparallel gravity was explored, leading to a new set of configurations consistent with observed pulsars. The model was applied to the pulsar 4U 1608-52 and stability analysis was performed by studying causality conditions and adiabatic index. Additionally, the consistency of the model with other pulsars was investigated.
We explore an interior solution of a physically symmetric vierbein with two unknown functions in conformal teleparallel gravity. The field equations can be described in a closed system for a particular form of the metric potentials and an appropriate anisotropic function. As a result, we find a new set of configurations consistent with observed pulsars. In particular, the boundary conditions for the interior spacetime are used for the Schwarzschild spacetime to constrain the conformal field with a unit value through the surface of a compact object. Furthermore, we apply the present model to the pulsar 4U 1608-52 with an approximate radius R = 9.52 +/- 0.15 km and mass M = 1.74 +/- 0.14M(circle dot). To analyze the stability, we also study the causality conditions and the adiabatic index by assuming the Tolman-Oppenheimer-Volkoff equation, an adiabatic index, and the static state. Moreover, the consistency of the model under consideration with other pulsars is investigated.
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